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Ventilation

Smarter Ventilation in Schools – Making IAQ Part of Sustainable Architecture

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Phil Mangnall, Sales Manager at Jaga Heating Products UK, discusses how through the careful specification of a ventilation system, schools can reap the benefits of energy and cost efficiency, whilst providing an ideal internal environment for their students and staff.

There are approximately 10 million students currently in schools across the UK today. These children and young adults spend almost a third of their entire childhood at school, with around 70% of that time being spent indoors. It is a staggering statistic.

So, given the amount of time spent in these buildings, it is reasonable to expect them to be environments that help students thrive. Not only that, as a fundamental influence on the minds of future generations, surely they should be pillars of the environmental path that the construction sector is being encouraged to walk?

Architects are constantly being challenged to make efficiency gains. One area that allows this, whilst dramatically improving the internal environment for students, is ventilation.

Quite simply, we need to start taking ventilation seriously. It is more than just another facet of school building design; it is a rare opportunity to improve the health and well-being of staff and students in an environmentally friendly, cost efficient way.

Identifying the best ventilation system for any educational application can be complex – particularly given the need to factor in the three-pronged problem of indoor air quality (IAQ), energy-efficiency and sustainability that are underwritten by legislation and regulations for educational new builds.

But there is a logical solution that boosts all three without compromising an architect’s vision for a building: integrating dynamic Demand Controlled Ventilation (DCV) into a school’s heating system. It provides intelligent ventilation that satisfies regulatory requirements, stays within a project’s budget, and ensures the best possible learning environment for the students.

UntitledDCV is a modular, scalable solution that constantly monitors the IAQ on room by room basis, fully programmable and flexible enough to respond to differing demands. A CO2 sensor constantly monitors a classroom’s IAQ, processing the information and refreshing the air before excessively high levels of CO2 are reached. Essentially, extracting stale contaminated air and replacing it with fresh air from outside.

The intelligence to only vent fresh air as and when it is required is a highly efficient means of maintaining an optimal indoor environment – as high as 28% more efficient than natural ventilation, in fact, whilst eliminating the draughts, stuffiness and security risks that result from this alternative.

Furthermore, because it can be integrated within a school’s heating system – with the flexibility to have centralised, stand-alone or linked controls – it means that temperatures can be optimally regulated at all times, ensuring the right level of warmth according to a school’s preferences without wasting energy unnecessarily – a common trait in busy educational establishments.

By getting smarter about ventilation, schools can become examples of how to operate in an effective way that is aligned with social and environmental responsibilities. And there are options out there that can be specified in a bespoke way to satisfy architects’ requirements.

At Jaga, we call our Demand Controlled Ventilation system ‘Oxygen’, and it is fully compatible with the majority of our Low-H₂O radiators. Both Oxygen and our Low-H₂O Radiators have been certified for their energy-efficiency by KIWA. Oxygen has been recognised by the Educational Funding Agency (EFA) as a suitable solution on the Priority Schools Building Programme.

We immerse ourselves in every project, supporting both on site and with our dedicated technical team, providing genuinely tailored heating and ventilation systems. If you would like to learn more about Jaga Oxygen DCV, you can download our Ventilation in Schools Interactive Guide, or visit www.jagaoxygen.co.uk

Don’t Forget about Ventilation

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AirflowLogo Blue&Red PMS286+185 Version2

 

 

Avoid Toxic Home Syndrome

  • 70% of our time is spent indoors
  • We invest in Heating systems and Insulation, but forget about the Ventilation. All three go hand in hand

Why is Ventilation Important

  • A typical family of 4 produces up to 16 litres (28 pints) of moisture a week.

Causes of Poor Ventilation

  • Washing and Drying indoors
  • Bathing
  • Pollen, Dust Mites
  • Paint
  • Cooking
  • Cleaners, VOC’s

Effects of Poor Ventilation

  • Condensation
  • Bed Bugs
  • Allergies
  • Dampness and Mould
  • Asthma, Respiratory problems

Why is this happening?

  • As we renovate, refurbish and restore older dwellings, we are reducing natural ventilation (leakage) and insulating them to a higher level.
  • New Buildings are constructed to a higher standard of regulation, more effectively sealed and unable to “breath”
  • Moisture, airborne pollutants and particulates cannot erscape the envelope resulting in

TOXIC HOME SYNDROME

Build tight, Ventilate right

  • Implement ventilation measures and choose to live with better Indoor Air Quality for you and your family.
  • Protect the fabric integrity of your home by combatting harmful elements that can degrade the value of your investment
  • Save energy by adopting a balanced approach to Heating, Insulation and Ventilation technologies.

A Balanced Home Environment is a healthier, energy efficient home for both the occupants and the dwelling.

Visit: http://www.myhealthmyhome.com

 

 

Cool-phase Hybrid: Utilising Phase Change Material and integrated Heat Pump

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For the Ultimate in air quality control at 20% of the running cost of A/C

What is Cool-phase Hybrid?
Cool-phase is an award winning, low energy cooling and ventilation system that creates a comfortable, fresh and healthy indoor environment that can significantly reduce the running costs of buildings. Cool-phase Hybrid is an innovative enhancement that links high efficiency air to water heat pumps with our natural cooling phase change material system.

The Cool-phase system is a natural cooling system that uses night time cooling to charge thermal batteries which contain phase change material (PCM). The natural cooling system combines the cooling effect of the PCM with fresh air provided by the integral air handling unit of the Cool-phase system to provide low energy ventilation and cooling. This combination will not match the thermal performance of air conditioning but dramatically reduce energy consumption whilst offering an improvement on thermal conditions. Passive or natural design solutions are designed to take in to account the buildings properties, the local weather conditions and the internal loadings such as electrical lighting and occupancy levels. If for instance the weather is particularly hot, passive or natural design solutions will provide elevated temperatures above fine set point limits such as 24°C. For clients seeking such fine tolerance of set point control, the Cool-phase Hybrid system firstly guarantees night time charge of the thermal batteries during peak summer periods but also allows additional top up cooling to be provided during the day. This integration of cooling technologies ensures optimum efficiencies and maintains tight set point control.

How does Cool-phase Hybrid work?
Cool-phase uses a thermal energy store which utilises a Phase Change Material (PCM) combined with an intelligently controlled Air Handling Unit to actively ventilate and cool the building. The Cool-phase system can maintain temperatures within a comfort able zone, while radically reducing energy consumption by up to 90% compared with a conventional cooling system.
The effect of adding thermal mass to a building combined with measures to control internal and external heat loading, can be a very effective method of ensuring that the building meets requirements for thermal comfort. However during a period of hot weather, temperatures will invariably rise over time, as there is no method of actively dissipating the buildup of heat. Therefore the effect of adding thermal mass can diminish over a warm spell, although the building takes longer to heat up during the day, it will also take longer to cool down at night time and therefore not all of that heat may be dissipated by the following day. Unlike passive applications where thermal mass is simply added to a building, the Cool-phase system is able to intelligently control how energy is stored and released from the thermal store, by using a heat exchanger and mechanical ventilation. The heat built up during the day can therefore be released at night and the thermal energy store recharged. When this is combined with the effects of free cooling and night time ventilation, the result is a system that can reliably maintain temperatures within comfort zones while radically reducing energy consumption.

Our advanced control system maximises the use of thermal storage through the use of phase change material, fresh air and high efficiency heat pumps. The Cool-phase Hybrid ensures excellent internal comfort conditions and optimum air quality levels at the most efficient energy use possible.
The Cool-phase system is mounted within the room as a decentralised ventilation system. Each Cool-phase Hybrid unit is fitted with a low pressure heat exchanger within the Cool-phase recirculation module. The control system senses the room temperature, room air quality level and external air temperature, automatically selecting the most efficient method for ventilating and cooling the room.

What is a Monobloc Heat Pump?
The Monobloc heat pump provides chilled water during summer periods and hot water during winter periods allowing additional heating to be provided by the Cool-phase Hybrid system in winter periods. The Monobloc heat pump is fully integrated with the Cool-phase system. Integrated control logic. DC inverter compressor. R410A refrigerant within heat pump module only limits the use of refrigerants. Operates as low as -20°C.

The Monobloc heat pump is connected to the Cool-Phase system via a heat exchanger. The heat exchanger is specifically designed and optimised by Monodraught’s engineers for this application and it is integrated within the Cool-phase units. The heat pump can therefore channel chilled or hot water to the heat exchanger inside the Cool-phase
system. The heat exchanger works in conjunction with the Cool-phase’s existing recirculation unit, allowing
air to be supplied to the room or to charge the thermal batteries (PCM), depending on the requirements at a given time.

 

Why choose Cool-phase?
Very low running costs.
Highly energy efficient system.
Long Life and a warranty of 5 years.
Modular, scalable and adaptable design.
Creates a healthy and productive environment.
Emission savings and carbon reductions offering BREEAM credits.
Demand control ventilation enhances energy efficiency.
Environmentally friendly and sustainable solution.

Why choose Cool-phase Hybrid?
Added Benefits of the Hybrid System

Precise Temperature Control:This new system allows for more precise room temperature control as it will have the capacity required to achieve a set point temperature with consistency.

Capacity to Achieve Set Point Temperature with Consistency: In cooling mode, the thermal batteries are charged during the night when the temperature drops down. However, during certain times in the summer period, the temperature at night, especially around relatively warm buildings, cannot drop below a certain point and allow for the batteries to be charged. In such cases, the Cool-phase Hybrid system can utilise the heat pump to charge the thermal batteries, by allowing cold air to pass through them.

Charging of the Thermal Batteries when External Conditions Will Not Allow: The same principle applies during the heat recovery mode. If the inside of the building is not warm enough to provide enough heat to the batteries, the heat pump can supply air to the thermal batteries in order to fully charge them.

Provide Direct Heating or Cooling when the Thermal Batteries Run Out of Capacity: In the case that the thermal batteries run out of capacity, the new system will have the capability to cool or heat the room directly by supplying air at the required temperature.

Reduce the Number of Cool-Phase Units Required for an Application: The new system will allow the amount of Cool-phase units required for a given application to be reduced.

Support of Multiple Cool-Phase Systems: Capability of supporting multiple Cool-Phase Hybrid systems with one heat pump (Depending on heat pump capacity: 5kW-7kW).
Keeps running costs and CO2 emissions to a minimum.

Airflow Developments – New LOOVENT eco Delivers Low Energy with Multi Function Ventilation

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Complementing its existing range of “ecoair” ventilation solutions, Airflow introduces the new LOOVENT eco fan.

A completely new re-design of the million selling Loovent, the fan features exceptionally quiet, two speed intermittent extraction up to 31 l/sec, or, at the flick of a switch during installation, a choice of five speed, continuous (dMEV) ventilation.
Versatile for portrait and landscape orientation, either recessed or surface mounted, the compact design represents the smallest footprint in its class.

Operating from just 2.8 watts it is economical to run and with a specific fan power of just 0.21 w/l/sec on low speed (0.41 w/l/sec on high speed), it is significantly less than the 0.5 w/l/sec for intermittent flow required by the 2010 Building Regulations.
A low energy, ball bearing, DC motor ensures long term reliability with minimal maintenance making it ideal for Social Housing applications where asset pay back is a priority.

From just 25 d(B)A it is also extremely quiet in operation and perfect for both through the wall and ducted installations. Designed with the same mounting chassis as previous Loovent models the replacement of older versions is quick and easy.
Control functions include user selectable, Delay start option, Timer, Humidity and Motion sensor

LOOVENT eco dMEV models are designed to meet the requirements of SAP Appendix Q, and feature continuous ventilation operation. At the time of installation, a constant flow of either 7 l/sec for toilets, 9 l/sec suitable for en-suites, bathrooms and utilities or 16 l/sec, suitable for kitchens, may be set to meet a whole house decentralised continuous ventilation strategy (d-MEV) for dwellings with a low air infiltration rate. An “On -Demand” boost speed enables rapid ventilation when required.

John Kelly, Marketing Manager from Airflow, said: “The Airflow Loovent brand has been a by-word for quality and reliability for decades, and this latest model range is designed to provide a quiet, low energy, multipurpose ventilation solution. It is perfect for replacing existing Loovents and for specification to reduce the carbon footprint as part of a whole house ventilation strategy, for cost effective extraction in increasingly well sealed dwellings”

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